This map shows the geographic impact of E. Öpik's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by E. Öpik with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites E. Öpik more than expected).
This network shows the impact of papers produced by E. Öpik. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by E. Öpik. The network helps show where E. Öpik may publish in the future.
Co-authorship network of co-authors of E. Öpik
This figure shows the co-authorship network connecting the top 25 collaborators of E. Öpik.
A scholar is included among the top collaborators of E. Öpik based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with E. Öpik. E. Öpik is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Öpik, E.. (1979). Barnard's Star. 14. 26.
2.
Öpik, E.. (1978). NEWS and COMMENTS: Charon, the Remarkable Satellite of Pluto; Origin by Fission and the Mass of Charon; Astronomy and the News Media; Large Numbers not so Large at all; Colonization of Space; Ufomania; Germs from Space?; Creation and Evolution. 13. 198.1 indexed citations
3.
Öpik, E.. (1974). A meteorite that got away. 11. 165.1 indexed citations
4.
Öpik, E.. (1973). The optical oblateness of Mars. 11. 1.1 indexed citations
5.
Öpik, E.. (1973). Our Cosmic Destiny. 11. 113.1 indexed citations
6.
Öpik, E.. (1972). Comments on Lunar Origin. 10. 190.18 indexed citations
7.
Öpik, E.. (1970). Comet Tago-Sato-Kosaka (1969g).. 9. 227.3 indexed citations
8.
Öpik, E.. (1970). The Sonic Boom of the Boveedy Meteorite. 9. 308.2 indexed citations
9.
Öpik, E.. (1969). Comments on Cosmic Physics. 9. 173.1 indexed citations
10.
Öpik, E.. (1969). Mars: the Changing Picture. 9. 136.3 indexed citations
11.
Öpik, E.. (1969). Tidal Evolution of the Earth-Moon System. 9. 120.2 indexed citations
12.
Öpik, E.. (1967). Evolution of the Moon's Surface I. 8. 38.6 indexed citations
13.
Öpik, E.. (1964). Comet nuclei as the principal source of meteorites.. 12. 589–594.2 indexed citations
14.
Öpik, E.. (1963). Photometry, dimensions, and ablation rate of comets. 6. 93.1 indexed citations
15.
Öpik, E.. (1958). Perturbations of a Satellite by an Oblate Planet. 5. 79.1 indexed citations
16.
Öpik, E.. (1958). Meteor Impact on Solid Surface. 5. 14.25 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.